code: def test_pack_not_exist_file():
      with pytest.raises(FileNotFoundError):
          pack(files={"a": "aaa"}, yaml_files={}, outpath="out")
  
file_path: espnet/test/espnet2/main_funcs/test_pack_funcs.py
imports: import tarfile
  from pathlib import Path
  import pytest
  import yaml
  from espnet2.main_funcs.pack_funcs import find_path_and_change_it_recursive, pack, unpack
label_desc: Use image node_id 3 for calling a global function with example usage: test_pack_not_exist_file() without return types